MMS 4 EDI: Ambient Electron Flux Measurements at 1024 Hz

NASA's Magnetospheric Multiscale (MMS) mission 4 satellite provides Level 2 electron flux data from its Electron Drift Instrument (EDI) in ambient burst mode. The dataset contains high-resolution measurements at 1024 samples per second (0.9765625 ms), capturing field-aligned electron fluxes. Data includes beam firing directions, times-of-flight, quality indicators, and timestamps, reported in telemetry slots.

Use Cases

• Analyzing high-frequency variations in ambient electron fluxes based on the 1024 Hz sampling rate.
• Studying field-aligned electron pitch angle distributions based on the instrument's operational mode.
• Investigating signal-to-noise ratio thresholds for beam detection in varying background flux conditions.
• Correlating electron drift velocity and electric field data with other MMS instrument measurements.

Strengths

• Data is collected at a high temporal resolution of 1024 samples per second (0.9765625 ms).
• Produced by NASA's authoritative Magnetospheric Multiscale (MMS) mission.
• Instrument can adjust field of view quickly for continuous sampling at selected pitch angles.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data has no fixed time-resolution as beam detection times are not synchronized with telemetry.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Measured by the Electron Drift Instrument (EDI) on the MMS 4 satellite in ambient burst mode.

Time Range

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Freshness

Last updated 2026-03-13 08:19:38.867946; freshness should be verified.

Geography

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